1 files changed, 8 insertions, 0 deletions

diff --git a/scripts/checkpatch.pl b/scripts/checkpatch.pl
index 28516587baba..561f41ef531f 100755
--- a/scripts/checkpatch.pl
+++ b/scripts/checkpatch.pl
@@ -3396,6 +3396,14 @@ sub process {
                              "Prefer dev_$level(... to dev_printk(KERN_$orig, ...\n" . $herecurr);
                 }
 
+# ENOSYS means "bad syscall nr" and nothing else.  This will have a small
+# number of false positives, but assembly files are not checked, so at
+# least the arch entry code will not trigger this warning.
+                if ($line =~ /\bENOSYS\b/) {
+                        WARN("ENOSYS",
+                             "ENOSYS means 'invalid syscall nr' and nothing else\n" . $herecurr);
+                }
+
 # function brace can't be on same line, except for #defines of do while,
 # or if closed on same line
                 if (($line=~/$Type\s*$Ident\(.*\).*\s*{/) and